For most of my life I was pretty miserable. There were good reasons for that: alcoholic parents, serious illness and rather a lot of poverty, among other things.
So I started meditating. That helped, after a while (quite a while, though many people get faster results.)
One of the things that came up is that bad emotions are, well, bad. By “bad” I mean, emotions that are unpleasant. There’s a lot of advice around emotions, and negative emotions aren’t 100% evil or anything. Anger tells you something is unacceptable; hatred that someone is a long term threat and so on. Now emotions aren’t always right, you can be angry inappropriately. You can hate people who aren’t a threat (Nazis hating Jews) or who are only a threat because of how you treat them (Israeli Zionists and Palestinians), and so on.